import datetime
import requests
from typing import Dict, Any, Optional


# assistant/tools.py

def clean_text(text: str) -> str:
    """清理输入文本"""
    return text.strip()

def validate_input(text: str) -> bool:
    """检查输入是否为空"""
    return bool(text and text.strip())

def parse_query_params(text: str) -> dict:
    """解析查询参数（占位实现）"""
    return {}

def get_current_time() -> str:
    """获取当前时间"""
    from datetime import datetime
    return datetime.now().strftime("%Y-%m-%d %H:%M:%S")

def get_weather_info(city: str) -> str:
    """模拟天气查询"""
    return f"{city} 当前天气：晴，25℃，空气良好。"

def search_knowledge_base(query: str) -> str:
    """模拟知识库检索"""
    return f"未找到与「{query}」相关的知识，请稍后再试。"
